Apparatus for making bags



Oct. 26, 1937. 1', E. COTY APPARATUS FOR MAKING BAGS Original Filed Sept. 15, 1934 3 Sheets-Sheet 1 Oct. 26, 1937. 'r. E. 1co1 Y APPARATUS FOR MAKING: BAGS Original, Filed Sept. "15, 1934 3 Sheets-Sheet 2 fiomas Z'ak/ C02 Oct. 26, 1937. o-ry 2,096,789

APPARATUS FOR MAKING BAGS Original Filed Sept. 15, 1934 3 Sh eetsSheet 3 y t 'oNITE-DqsTAT original application September- 15, 1934, Serial j No.:.744,229. Divided and this application Au 1 'f gust 11, 1936,, Serial No. 95,324 i '1 cm- -9 -1 I. a My present invention relates to. bag manufac- My improved method of manufacture, thereture, and this applicatiomis a division of my fore, consists in opening the 'end'of the bagparallel. pending. application, Serial Number blank so as to for'm's'ide folds andlong'itudinal 744,229, illed september 15, 1934, and covers folds for forming a closure, applying paste apparatus for practicing conveniently .themethbetween the side folds 'and 'the other parts of'the 0d covered by the application, SerialwNumber web-forming theclosure, and then" turning and 744,229. a r i f c x 1 v pasting the folds to complete-the "operation.

In making-bags in which the bottom is folded Other more s'pecificdetails of the method will-'be V and pastedvin-place, it;is a common practice to found 'in the claims. Mechanically th' eljmeans 0 cut. short slitsparallel to thefsides'of the bagfor practicing the improvement in the'artfc'on- 10 blank in order .to facilitate the folding.- Side sists 'of'me'ans for forming side-f0lds'and lon'gifolds or flaps and; longitudinal folds, are then tudinalfolds in a bag-closure; means: for applyformed by opening the bottom andturningback ing paste between-the side folds and the other one of the longitudinal folds,'giving thebag when parts of the web forming the. closure, and means '1 completed I the well knownr diamond fold. for completing the closure. More detailed eir- 7 There have been difliculties attendant upon, this plication will be found'in the 'claimsf Ihave construction, particularly in making the bottom shown only a bottom closure,'as' that is sufficient tight at the roots of the 511115;.01 when the slits to make the matter clear; The multiwall valveare not used, asfis possible with some formsof bag in common use has both-ends closed, and-the bag,in securing the corners of the folds in place invention is available-for the valve-end-also. 20

' at that location. The accompanying drawings show anembodi- Heretofore. no machine has been devised for mentof the mechanical features of my invention, applying paste between the side folds} and the by which the improvement in the art may be r part of the web forming, the bottom of-the finpracticed: s v I 1 '25 i'shed bag. In consequence pockets areformed Figure 1 is a diagrammatic plan showings. bag (by turning over the side. folds) which may. bepassingthrough this part of the apparatus," come filled with'cement or other materials, usu- Figure 1 is a viewof'a bag having no slits,'with' ally. .pulverulent, contained in the bags When the invention applied thereto; v n

. the bag has been filled and is then dropped or Figure 2 is a side elevationpartly in'section f tossed around, the contents acts by itsfweightas and partly diagrammatic of a; machine for carry- 30 a wedgeand gradually forces the-fflaps apart ing out the process indicated in-Figure 1.

until a leak is formed, or even a rent which ruins Figure 3 is'a side elevation of some partsshown the bag. This defect has heretofore vbeen in Figure 2, also partly in section. 11 I thought unavoidable, and so far as I know, :1 Figure 41s an end view of the pasting; inechawayhas beenfound to cure it. nism. 35

'I have found it possible to. correctthis diificulty Figure 5 is a separate detail view showing the substantially completelyyby applying paste to, the pasters or pads in two positions. f surfaceof the sideflaps referred to so thatthey' Figures 6 and '7 are perspective'sketches on a; areefirmlyattac hedto the adjacent parts ofthe larger scale of one of the pasting mechanisms; e

40 web forming the bottom of the bag. This may with the cam operating it, and theluniversal 40 1 be done by hand, but of course suchan expedient joint which I have devised forthisjmovement: is inadmissible and inefllcient. While a device Figure fishowing the pad in pastingpositiori, and

ior that purpose would apparently necessarily be Figure 7 when not'so acting. v I complex and costly, ,bythe: simple mechanism Figure 815a sk f completed b w described and illustrated in this case, it ispossible llhave indicatedcertain-partsof a fbottomer" 45 to. effect the result withoutisiowing'up the manuin orderto make clear a desirable location for the lecture, and without increasing operating or mechanical part of my inVentiom-the bottomerlabor costs, or overhead except by the small is of the typeishown in Letters-Patent to ALC. amountof interest and depreciation on theand-T. E; CotmSerial Number 1,770,972, dated mechanism; whiie,.on theother hand, the inven- July 22nd,-1930, though other machinesmay be 50'- tion makes it possibleto makea three -ply bag used; i r d which is stronger than a four-plyvbagmade in' In Fi A 15 the b in s P 30 former ways, as careful tests have shown, and as it enters thenew pasting mechanism hereinthus to make a large savingin paper, paste and after described, and successive'positions are -in-. labor. dicatedat A A, A and A; B is the side flap 56 right will be superposed on of the bag, and C is the part of a flap which corresponds to the slitted part of the web. At E I have shown a guide mechanism which acts to turn back the fiapsC until they are in substantially a vertical position, and at the same time lifts the side fold B so that the pasting mechanism may pass thereunder, as hereafterindicated. This position is shown at A At A" the, pasting mechanism has applied paste at F, F, while the flap C is still turned up. At A a guide H has beeninterposed, which turns down the flap C so that the side fold is secured to the other parts ofthe web forming a closure. The bag then passes on to A; therpaste pad of the bot- =tomer here applies the paste at G,so that when the two flaps are folded overthe one on the to form a tight closure.

' For'bags such as shown in Figure 1' it is obvious that the guides E and H will not be'needed inasmuch as'there is no-flap C to be'turned up; and the guide E need not be employed for the purpose of lifting the flap B. As will be obvious from the shape ofthe pasting=mechanism (see Figures 5, 6 and 7) the paste pads themselves will 7 lift the-side flap B sumciently, and the guide Efor this form of the, bag would have no function,

thoughthemechanism would operate with'ityin place, on bags like that shown in Figure 1'.

In Figure 2 I have shown the mechanism-arranged in place between the openingmechanism for the bag-bottom and the folding devices of a bottomer such as theone already referredto, as shown ffor example in :Figure 11 of :Efatent No. 1,770,972., The cylinder Mis mounted on the main power-shaft of the bottomer. By me'ansof the gear M indicated diagrammatically the cyle inder K is operated, this being the creaser cylinder of the bottomer, which bears that reference letter in the patentrreferred to. M alsodrives the pulley M",around which one set of. the belts N passes as shown in Figure4, there are two 'setsof these belts or tapes N. 'I'hegear M on the shaft of the cylinder M acts to drive these cylinders or gearsr On the other side of the cylinder M the'gear M mesheswith M and drives the gear M around a pulley upon which the belts pass, and'that geardrives the gear M which operates the cylinder J of the opening mechanism ofthe bottomer. The pulley M is loose on the shaft of the gear M and M is an ordinary belt-tightener-mounted on an arm and 7 having a spring ,(notshown) to press it against the belt. The cylinder V can-ies the paste pads W the construction of which will be described later, and these pads pass over the pasting mechanism 0. A paste device has a roll K running in a tank K and with a distributing drum K is also used to apply the. paste G shown a in Figure l, by well-known mechanisms not shown. It will be seen that the bag A enters at the left between the cylinders I and J. It is shown already partly opened, the opening mechanism being that described in the patent al-" ready referred to. The .bagthen passes down between cylinders J and J over the cylinder L and beneath cylinder M, having passed over the, 7

guide E for opening the edges!) of the side folds B pads W, W are then operated, as presently to be described, and the blank then passes under the guides H to turn down the flaps C "and-thence around the creaser, cylinder K to the folders of the bottomer.

Figures 3, 4, 5, 6 and 7should be readtogether. I have not described thepaste-pad-operating the one on the left v lock-nut O. I

Turning now to Figures 6 and 7, the construction of the pads and the means of operating them mechanism in connection with Figure 2, because the parts are shown more plainly in the Figures now considered.

Referring first to Figure 4, the padsW, W,

are shown in the position which they will occupy when the paste is being applied beneath the folds and the guides E have turned back the parts C of the flaps B so as to be outof the way of the paste-pads. These pads (Figure 4), are mounted upon a bar W, and aswill beseen, maybe moved along the bar to adjust them for different positions as regards the width of the bag being made. The disks V constitute a cylinder, as

is well understood in bag-machines, and the has A is stretched from one to the other ofthe disks, the closure passing through the machines in latera] position. The bar w is fixed to the disks V VRshown on the right and left of Figure 4, and these-aremounted on the shaft P, which carries the disks or cylinder V and aresecured to disk V by a bolt V moving in the slot V shown in :Figure 3, which adjusts the position of the pads W, W, circumferentially with reference to the disks V,V-,an'd, so 'determine their relation to the bag-bottom; :It' will be seen that I this gives-a complete adjustability' around the circumference .of the disk within the necessary limits, and also a lateral adjustment to adapt them to different widths of bag-blank.

The pads are operated, as'wili be seen in Fig-.

ures 6 and'l, bymeans of a 'cam-roiler Vi -un 1 ning on a camV and held; inplace by a groove in the disk-V ,'a split-hub'VQ serving to adjust the position of the disk and cam'so that the paste pads W w=, will be actuated at .the proper time; a Figure 5,- which This construction is sketched in shows the tw'opads in'solid'lines in the n'on pastingposition, and in dotted lines in the posle tion in which pastels beingapplied. The pads take the paste fromthepasting device 0, (see Figure 3),in which the rnllerO driven by the roller 0 runs in the paste in the tank, and a I distributing roller 0 is in contact with the roller 0 and also is engaged by-each of the pads W W, as they pass it. The roller Oils carried on arm 0 which is'springpressed towards," the cylinder V, the spring being adjustableby a will be readily understood 1 will describe Figure 7 particularly, as'6 and 7 show the same inecha nism and I have omitted some of the reference with reference tothe roller :being adjusted by,

means of. the bolt V" shown in Figure 4 on the right. This cam operates an arm V', which has a split hubvfi'which may'be tightened upon the shaft V 'by meansof the boltV. Ontheshaft v is a hubV" which also, is rpm and issecured on the shaft by the boltv 'It will be Been that by easing" the bolt it is possible to slide the hub v along the shim v and in this way to regulate the stroke of the paste-pad W, approximating hub V to the stud V" abo'utwhich-the pad W reciprocates increasing the stroke. A rod V is secured in the hub V" by means of the set-screw V". This rod makes a working fit with a bore in the-biockV". 'A similar rod V passes through the hub V of an arm V", which carries apastepad W. This rod V makes a working fit with the bore in the block V superposed on the block W, and is held in place by a set-screw V"; and.

this part of the device beginning with the hub V oscillates by means of a hub V" around the stud V", which is carried by a slide V on the bar W,

as shown in Figure 4. This slide may be securedin place on the bar W by means of a bolt V.

As already stated, the hub V may be moved and the whole of this apparatus rotates with the cylinder V towards the observer in Figure 4 ,or to the right in Figure 2. As the shaft V" is thus carried around the cam V so long as the camroller is on the circular part of the cam, the pad W maintains the position shown in Figure 7.

When, however, the roller V is drawnby the ro-- tation of the shaft around the cam as it is drawn along by the disk V constituting the cylinder, it reaches the high parts of the cam and turns the shaft V" towards the observer in Figure 7. This causes the rod V to press up on the blockV and consequently upon the block V thus pressing up the rod V and presses the arm V to the left so as to bring the pad into the position shown in Figure 6. As soon as the roller V passes the high point of the cam, the pad W is withdrawn to the position shown in Figure 'l. The shaft V in Figure 4 appears just below the bar W. The cam-groove operates the roller V positively at all times.

It will be seen that in these combined instrumentalities the pads W W, are drawn over the paste-roller O by the rotation of the disks V. At the same time as the pads approach the position in which paste is to be applied between the side folds and the main web of the bag, the roller V comes to one of the high points of the cam V in Figure 7,-and moves these pads into the position shown in Figures 4 and 6 and in dotted lines in Figure ,5, in which they make contact with the bag A, as already described. Upon passing further along, the pads are brought back to the fullline position shown in Figure 5. They then are operated by the other hump of the cam V? so that they assume the position shown in Figure 6 as they pass over the paste-roller 0 then returning to the position shown in Figure 7.

It will be understood from Figures 3 and 4 that there are two sets of the pads, being four in all,

' to accommodate the four. positions of the paste F shown in Figure 1. The second set of pads being exactly like the first and being operated by simllar mechanism in the same way, it is unnecessary to describe them further.

The mechanism is so located with relation to the bottomer that its functions are performed between the time of opening the flaps or the bottom of the bag and the time when the bagv passes to the folding mechanism of the bottomer.

Figure 8 shows the bags finally completed, which does not differ in appearance from other well made bags, though of superior construction.

It is obvious that equivalent mechanisms could be devised which, while changing the form, would embody the invention hereindescribed, and If aim to cover such mechanism by the claims- Iclaimz 1. In bag-making machines, a paste -pad having two motions, one circumferentially coincident the other a lateral movement ,transverseto said path; and means for imparting the said lateral motion at desired times.

2. In the combination of claim 1, a cam and cam-roller, and'means for connecting the camroller with the paste-pad to give the latter a desired lateral motion.

3. In the combination of claim 1, a cam and cam-roller, and means connecting the cam-roller and the paste-pad to im'partto the pad the de- 1 .at a desired position with the path of 'a'bag-blank,

sired lateral motion, such means containing an universal joint.

4. ma bag-machine, a paste-pad and means for moving it into and out of applying position: the said means containing a pin oscillating'the pad about an axis, a second pin at an angle thereto, and means for moving the second pin about an axis substantially normal to that of the first pin.

5. In the combination of claim .4, a pair of blocks connectingthe pins, each block containing a a bore making a working fit with one of the pins. a

6. In the combination of claim 4, means for ad- 'justing'the position of engagement of the pins to vary the stroke of the paste-pad.

. 7. In combination in' a bag-machine, a shaft;

a cam; an arm attached to the'shaft; a cam roller carried by the armand operated by the as, x

cam to oscillate the shaft; a paste-pad; a pin carried by the pad; a pin carried by the shaft and oscillated thereby; and means for engaging the two pins so that the oscillation of theshaft will move the'paste-padinto'and out of pasteapplying position.

8. In the combination of claim means for the two pins, comprising blocks containing bores with which the pins make a working fit. 1 r

10. In a bag-machine, oscillating paste-pads at opposite sides of a bag-blank; meansfor adjusting the distance apart of the pads; and means for adjusting the arc of oscillation of the pastepads independent of the adjustment for distance.

11. In a bag-making machine, a paste-pad according to claim 1 and paste-supplying devices,

with means for causing the pad tooscillate twice f '7, means for adjusting the position of engagement ofthe two for each revolution of the machine, once to bring.

it into registry with the paste-su devices,v i

and a second time to apply the paste toythe de sired P311101? the as described.

cording to claim 1 and pastesupplyingdevices,

cams and cam-rollers for moving the pads twice I 001 12. In a bag-making machine, a pastepad ac i second time to applythe paste to the desired 7 7 parts of'the bagas described. i

' moms nanncorn 

